The Elder Scrolls V: Skyrim

So I killed the special Drauger at the end of the quest after he was made uninvincible (vincible?). In any event, once he died, the energy field that was surrounding the sphere didn't go away. I can backtrack through the dungeon but that would be irritating if I was unable to get the word wall behind it because the barrier won't go away.

The college mage removes the energy field while you fight and you only can kill him when the field is down. Back track and save just before going in, saves all that replay. I do that to all quests I do when getting to final end of them.

Invulnerable, unbreakable, unbeatable, etc are synonyms of invincible. An antonym of any of those words will work when describing something as the opposite of invincible.I stand corrected, though, vincible works. Never heard about that word before.